IICRC WRT EXAM 2026 (LATEST EXAM) | ALL QUESTIONS AND CORRECT ANSWERS |
GRADED A+ | NEWEST VERSION | VERIFIED ANSWERS
Question 1
At what minimum moisture level will wood support the growth of destructive wood-decaying
(rot) fungi?
A) 12%
B) 15%
C) 20%
D) 25%
E) 30%
Correct Answer: C) 20%
Rationale: Wood-decaying fungi require a minimum moisture content (MC) of 20% to
survive and proliferate. When wood reaches this threshold, the structural integrity of the
material is at risk because the fungi begin to digest the cellulose and lignin within the wood
fibers.
Question 2
How is "Relative Humidity" (RH) formally defined in the restoration industry?
A) The total weight of water vapor in a pound of dry air.
B) The ratio of moisture suspended in air expressed as a percentage of total moisture holding
capacity at a given temperature.
C) The force exerted by water vapor on the surrounding environment.
D) The temperature at which air reaches 100% saturation.
E) The speed at which moisture evaporates from a porous surface.
Correct Answer: B) Is the ratio of the moisture suspended in air expressed as a percentage of
total moisture holding capaciry of that air at a given temperature.
Rationale: RH is a comparative measurement. Because warm air can hold more moisture
than cold air, the percentage changes as the temperature changes, even if the actual amount
of water (GPP) remains constant.
Question 3
What does the acronym "ACM" stand for when evaluating a water damage site?
A) Advanced Controlled Mitigation
B) Asbestos Containing Material
C) Atmospheric Content Monitor
D) Automated Carpet Maintenance
E) Actual Cost of Materials
Correct Answer: B) Asbestos Containing Material
Rationale: Restoration technicians must identify ACM before disturbing building materials
(like floor tiles or popcorn ceilings). If asbestos is present, specific legal and safety protocols
must be followed to prevent hazardous fiber release.
, 2
Question 4
How often should a "Daily Humidity Record" be occurring to determine Grains Per Pound
(GPP)?
A) Every 4 hours
B) Every 6-8 hours
C) At least every 12-24 hours
D) Only at the start and end of the job
E) Once every 48 hours
Correct Answer: C) Occurring at least every 12-24 hours the recording the relative humidity
and temperature to determine Grains Per Pound (GPP).
Rationale: Daily monitoring is critical to ensure the drying environment is progressing.
Recording RH and temperature every 12-24 hours allows the technician to calculate GPP
and verify that the dehumidifiers are effectively removing moisture from the air.
Question 5
Why is it necessary to isolate affected areas from non-affected areas in a water damage scenario?
A) To prevent the customer from seeing the equipment.
B) Because areas not directly wet will experience humidity elevation.
C) To increase the noise level in the affected area.
D) To allow the technician to use smaller air movers.
E) To prevent the floor from scratching in unaffected rooms.
Correct Answer: B) Technicians must isolate affected areas from non affected areas to gain
best control of humidity.
Rationale: Moisture moves from areas of high concentration to low concentration. If the wet
area is not isolated, the high humidity will migrate to dry parts of the building, potentially
causing secondary damage to hygroscopic materials in those rooms.
Question 6
Vapor pressure will always seek which of the following within a confined space?
A) The highest point in the room.
B) A level of equilibrium.
C) The coldest surface available.
D) The area with the most air movement.
E) Direct contact with liquid water.
Correct Answer: B) ...seek a level of equilibrium within a confined space.
Rationale: Vapor pressure is a gaseous force. Just like heat moves to cold, high vapor
pressure will move toward areas of low vapor pressure until the pressure is equalized
throughout the space.
Question 7
How many grains of moisture are contained in one pound of dry air?
GRADED A+ | NEWEST VERSION | VERIFIED ANSWERS
Question 1
At what minimum moisture level will wood support the growth of destructive wood-decaying
(rot) fungi?
A) 12%
B) 15%
C) 20%
D) 25%
E) 30%
Correct Answer: C) 20%
Rationale: Wood-decaying fungi require a minimum moisture content (MC) of 20% to
survive and proliferate. When wood reaches this threshold, the structural integrity of the
material is at risk because the fungi begin to digest the cellulose and lignin within the wood
fibers.
Question 2
How is "Relative Humidity" (RH) formally defined in the restoration industry?
A) The total weight of water vapor in a pound of dry air.
B) The ratio of moisture suspended in air expressed as a percentage of total moisture holding
capacity at a given temperature.
C) The force exerted by water vapor on the surrounding environment.
D) The temperature at which air reaches 100% saturation.
E) The speed at which moisture evaporates from a porous surface.
Correct Answer: B) Is the ratio of the moisture suspended in air expressed as a percentage of
total moisture holding capaciry of that air at a given temperature.
Rationale: RH is a comparative measurement. Because warm air can hold more moisture
than cold air, the percentage changes as the temperature changes, even if the actual amount
of water (GPP) remains constant.
Question 3
What does the acronym "ACM" stand for when evaluating a water damage site?
A) Advanced Controlled Mitigation
B) Asbestos Containing Material
C) Atmospheric Content Monitor
D) Automated Carpet Maintenance
E) Actual Cost of Materials
Correct Answer: B) Asbestos Containing Material
Rationale: Restoration technicians must identify ACM before disturbing building materials
(like floor tiles or popcorn ceilings). If asbestos is present, specific legal and safety protocols
must be followed to prevent hazardous fiber release.
, 2
Question 4
How often should a "Daily Humidity Record" be occurring to determine Grains Per Pound
(GPP)?
A) Every 4 hours
B) Every 6-8 hours
C) At least every 12-24 hours
D) Only at the start and end of the job
E) Once every 48 hours
Correct Answer: C) Occurring at least every 12-24 hours the recording the relative humidity
and temperature to determine Grains Per Pound (GPP).
Rationale: Daily monitoring is critical to ensure the drying environment is progressing.
Recording RH and temperature every 12-24 hours allows the technician to calculate GPP
and verify that the dehumidifiers are effectively removing moisture from the air.
Question 5
Why is it necessary to isolate affected areas from non-affected areas in a water damage scenario?
A) To prevent the customer from seeing the equipment.
B) Because areas not directly wet will experience humidity elevation.
C) To increase the noise level in the affected area.
D) To allow the technician to use smaller air movers.
E) To prevent the floor from scratching in unaffected rooms.
Correct Answer: B) Technicians must isolate affected areas from non affected areas to gain
best control of humidity.
Rationale: Moisture moves from areas of high concentration to low concentration. If the wet
area is not isolated, the high humidity will migrate to dry parts of the building, potentially
causing secondary damage to hygroscopic materials in those rooms.
Question 6
Vapor pressure will always seek which of the following within a confined space?
A) The highest point in the room.
B) A level of equilibrium.
C) The coldest surface available.
D) The area with the most air movement.
E) Direct contact with liquid water.
Correct Answer: B) ...seek a level of equilibrium within a confined space.
Rationale: Vapor pressure is a gaseous force. Just like heat moves to cold, high vapor
pressure will move toward areas of low vapor pressure until the pressure is equalized
throughout the space.
Question 7
How many grains of moisture are contained in one pound of dry air?
